Can’t reset WordPress password

If you have access to the PHPMyAdmin login and access:

1. The wp_users table from the list of tables.
2. Then locate your username under the user_login column and click edit.
3. The user_pass is a long list of numbers and letters which is the MD5 hash encrypted version of your password.
4. Select and delete the hash and type in your new password (it is case sensitive!).
5. Once you have done that, click the dropdown menu indicated, and select MD5 from the menu.
6. Save the changes and attempt to login.

Since it sounds like your site is very old I would recommend updating the themes and plugins as needed.